Seagate Technology Incorporated

Thaveesinn Vasavakul

Jerry Joseph Weingord

Norbert Steven Parsoneault

Troy Michael Herndon

Robert Alan Nottingham

Jeffry Arnold LeBlanc

Mohammad Mahbubul Ameen

Christopher Michael Woldemar

James Scott Bowdoin

Kenneth Cornyn

James Ian Lee

James Sidney Lee

David Wuester

Kok Chai Low

Kirby V Pool

In one example, an FDB motor having a shield member is provided. In one example, the method includes disposing a first member and a second member for relative rotation about an axis of rotation. An annular shield member is attached to the first member, the shield member disposed adjacent a fluid reservoir for containing a bearing fluid. The reservoir is filled through an aperture (e.g., a fill hole) in the shield member. Thereafter, the aperture is at least partially sealed. The aperture may be hermetically sealed via one or more laser pulses. In other examples, a two piece shield is provided for shielding a reservoir without a fill hole.

Shield restricting axial movement

A component of a disc drive has a coating of a predetermined length on its surface, the coating having at least two separate tapered regions applied in independent steps, the at least two separate tapered regions each having a length that is less than the predetermined length of the component surface. When the component is a shaft of a spindle motor, the ends of the shaft are masked before the tapered regions of coating are applied, and the thickness of the masks covering the shaft ends is varied to control a taper of tapered regions.

Tapered shaft coating

In one example, a fluid dynamic bearing motor having a shield member is provided. In one example, the method includes disposing a first member and a second member for relative rotation about an axis of rotation. An annular shield member is attached to the first member, the shield member disposed adjacent a fluid reservoir for containing a bearing fluid. The reservoir is filled through an aperture (e.g., a fill hole) in the shield member. Thereafter, the aperture is at least partially sealed. The aperture may be hermetically sealed via one or more laser pulses. In other examples, a two piece shield is provided for shielding a reservoir without a fill hole.

Shielding fluid reservoirs of fluid dynamic bearing motors

Method for controlling shaft coating taper

A single step shaft assembly and oil fill process begins with the sleeve and thrust plate being assembled, leaving open the entire shaft cavity. The assembly is then placed in an evacuation chamber, and air is evacuated. A measured amount of oil or hydrofluid is then placed in the shaft cavity. The shaft is then inserted in the shaft cavity and pressed or otherwise inserted into an opening in the thrust plate. When this is done, the oil will disperse throughout the bearing fluid gap and cavity. When properly measured, no oil will exit the cavity.

Vacuum fill/assembly method for fluid dynamic bearing motor

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Watsonville, CA, United States of America

Thaveesinn Vasavakul